Youtube On My Mobile Phone?

I Have a Samsung/verizon alias which can flip both ways one side for texting internet games and music and the other side for calling or dialing numbers im not sure what the model number is somthing close to samsung SCH U740 when i go on the internet and try to watch a youtube video on youtube mobile i get a malaformed url message which appears on every video i go to? is it my phone which dosent support youtube or is it somthing i didnt download or i need to switch the settings or somthing like that